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                        自述
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                            <b>1.</b>
                        
                        介绍
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                            <b>1.1.</b>
                        
                        动机
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                            <b>1.2.</b>
                        
                        核心概念
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                            <b>1.3.</b>
                        
                        三大原则
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                            <b>1.4.</b>
                        
                        先前技术
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                            <b>1.5.</b>
                        
                        生态系统
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                            <b>1.6.</b>
                        
                        示例
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                            <b>2.</b>
                        
                        基础
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                            <b>2.1.</b>
                        
                        Action
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                            <b>2.2.</b>
                        
                        Reducer
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                            <b>2.3.</b>
                        
                        Store
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                            <b>2.4.</b>
                        
                        数据流
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                            <b>2.5.</b>
                        
                        搭配 React
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                            <b>2.6.</b>
                        
                        示例：Todo List
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                            <b>3.</b>
                        
                        高级
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                            <b>3.1.</b>
                        
                        异步 Action
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                            <b>3.2.</b>
                        
                        异步数据流
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                            <b>3.3.</b>
                        
                        Middleware
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                            <b>3.4.</b>
                        
                        搭配 React Router
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                            <b>3.5.</b>
                        
                        示例：Reddit API
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                            <b>3.6.</b>
                        
                        下一步
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                            <b>4.</b>
                        
                        技巧
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                            <b>4.1.</b>
                        
                        迁移到 Redux
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                            <b>4.2.</b>
                        
                        使用对象展开运算符
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                            <b>4.3.</b>
                        
                        减少样板代码
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                            <b>4.4.</b>
                        
                        服务端渲染
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                            <b>4.5.</b>
                        
                        编写测试
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                            <b>4.6.</b>
                        
                        计算衍生数据
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                            <b>4.7.</b>
                        
                        实现撤销重做
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                            <b>4.8.</b>
                        
                        子应用隔离
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        <li class="chapter " data-level="4.9" data-path="docs/recipes/StructuringReducers.html">
            
                
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                            <b>4.9.</b>
                        
                        组织 Reducer
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                            <b>4.9.1.</b>
                        
                        Reducer 基础概念
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                            <b>4.9.2.</b>
                        
                        Reducer 基础结构
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        <li class="chapter " data-level="4.9.3" data-path="docs/recipes/reducers/SplittingReducerLogic.html">
            
                
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                            <b>4.9.3.</b>
                        
                        Reducer 逻辑拆分
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        <li class="chapter " data-level="4.9.4" data-path="docs/recipes/reducers/RefactoringReducersExample.html">
            
                
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                            <b>4.9.4.</b>
                        
                        Reducer 重构示例
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        <li class="chapter " data-level="4.9.5" data-path="docs/recipes/reducers/UsingCombineReducers.html">
            
                
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                            <b>4.9.5.</b>
                        
                        `combineReducers` 用法
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        <li class="chapter " data-level="4.9.6" data-path="docs/recipes/reducers/BeyondCombineReducers.html">
            
                
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                            <b>4.9.6.</b>
                        
                        `combineReducers` 进阶
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        <li class="chapter " data-level="4.9.7" data-path="docs/recipes/reducers/NormalizingStateShape.html">
            
                
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                            <b>4.9.7.</b>
                        
                        State 范式化
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        <li class="chapter " data-level="4.9.8" data-path="docs/recipes/reducers/UpdatingNormalizedData.html">
            
                
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                            <b>4.9.8.</b>
                        
                        管理范式化数据
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        <li class="chapter " data-level="4.9.9" data-path="docs/recipes/reducers/ReusingReducerLogic.html">
            
                
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                            <b>4.9.9.</b>
                        
                        Reducer 逻辑复用
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        <li class="chapter " data-level="4.9.10" data-path="docs/recipes/reducers/ImmutableUpdatePatterns.html">
            
                
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                            <b>4.9.10.</b>
                        
                        不可变更新模式
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        <li class="chapter " data-level="4.9.11" data-path="docs/recipes/reducers/InitializingState.html">
            
                
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                            <b>4.9.11.</b>
                        
                        初始化 State
                    </a>
            
            
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        <li class="chapter " data-level="5" data-path="docs/FAQ.html">
            
                
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                            <b>5.</b>
                        
                        常见问题
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        <li class="chapter " data-level="5.1" data-path="docs/faq/General.html">
            
                
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                            <b>5.1.</b>
                        
                        综合
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        <li class="chapter " data-level="5.2" data-path="docs/faq/Reducers.html">
            
                
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                            <b>5.2.</b>
                        
                        Reducer
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        <li class="chapter " data-level="5.3" data-path="docs/faq/OrganizingState.html">
            
                
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                            <b>5.3.</b>
                        
                        组织 State
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        <li class="chapter " data-level="5.4" data-path="docs/faq/StoreSetup.html">
            
                
                    <a href="../../docs/faq/StoreSetup.html">
                
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                            <b>5.4.</b>
                        
                        创建 Store
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        <li class="chapter " data-level="5.5" data-path="docs/faq/Actions.html">
            
                
                    <a href="../../docs/faq/Actions.html">
                
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                            <b>5.5.</b>
                        
                        Action
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        <li class="chapter " data-level="5.6" data-path="docs/faq/CodeStructure.html">
            
                
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                            <b>5.6.</b>
                        
                        代码结构
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        <li class="chapter " data-level="5.7" data-path="docs/faq/Performance.html">
            
                
                    <a href="../../docs/faq/Performance.html">
                
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                            <b>5.7.</b>
                        
                        性能
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        <li class="chapter " data-level="5.8" data-path="docs/faq/ReactRedux.html">
            
                
                    <a href="../../docs/faq/ReactRedux.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.8.</b>
                        
                        React Redux
                    </a>
            
            
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        <li class="chapter " data-level="5.9" data-path="docs/faq/Miscellaneous.html">
            
                
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                            <b>5.9.</b>
                        
                        其它
                    </a>
            
            
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            </ul>
            
        </li>
    
        <li class="chapter " data-level="6" data-path="docs/Troubleshooting.html">
            
                
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                            <b>6.</b>
                        
                        排错
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        <li class="chapter " data-level="7" data-path="docs/Glossary.html">
            
                
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                            <b>7.</b>
                        
                        词汇表
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        <li class="chapter " data-level="8" data-path="docs/api/index.html">
            
                
                    <a href="../../docs/api/index.html">
                
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                            <b>8.</b>
                        
                        API 文档
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            <ul class="articles">
                
    
        <li class="chapter " data-level="8.1" data-path="docs/api/createStore.html">
            
                
                    <a href="../../docs/api/createStore.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.1.</b>
                        
                        createStore
                    </a>
            
            
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        <li class="chapter " data-level="8.2" data-path="docs/api/Store.html">
            
                
                    <a href="../../docs/api/Store.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.2.</b>
                        
                        Store
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        </li>
    
        <li class="chapter " data-level="8.3" data-path="docs/api/combineReducers.html">
            
                
                    <a href="../../docs/api/combineReducers.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.3.</b>
                        
                        combineReducers
                    </a>
            
            
        </li>
    
        <li class="chapter active" data-level="8.4" data-path="docs/api/applyMiddleware.html">
            
                
                    <a href="../../docs/api/applyMiddleware.html">
                
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                            <b>8.4.</b>
                        
                        applyMiddleware
                    </a>
            
            
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        <li class="chapter " data-level="8.5" data-path="docs/api/bindActionCreators.html">
            
                
                    <a href="../../docs/api/bindActionCreators.html">
                
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                            <b>8.5.</b>
                        
                        bindActionCreators
                    </a>
            
            
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        <li class="chapter " data-level="8.6" data-path="docs/api/compose.html">
            
                
                    <a href="../../docs/api/compose.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.6.</b>
                        
                        compose
                    </a>
            
            
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            </ul>
            
        </li>
    
        <li class="chapter " data-level="9" data-path="docs/react-redux/index.html">
            
                
                    <a href="../../docs/react-redux/index.html">
                
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                            <b>9.</b>
                        
                        react-redux 文档
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="9.1" data-path="docs/react-redux/api.html">
            
                
                    <a href="../../docs/react-redux/api.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>9.1.</b>
                        
                        API
                    </a>
            
            
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        <li class="chapter " data-level="9.2" data-path="docs/react-redux/troubleshooting.html">
            
                
                    <a href="../../docs/react-redux/troubleshooting.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>9.2.</b>
                        
                        排错
                    </a>
            
            
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            </ul>
            
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                        <a id="edit-link" href="https://github.com/camsong/redux-in-chinese/tree/master/docs/api/applyMiddleware.md" class="btn fa fa-edit pull-left">&#xA0;&#xA0;&#x5F00;&#x59CB;&#x7EA0;&#x9519;</a><h1 id="-applymiddleware-middlewares"><code><span class="token function">applyMiddleware</span><span class="token punctuation">(</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>middlewares<span class="token punctuation">)</span></code></h1>
<p>&#x4F7F;&#x7528;&#x5305;&#x542B;&#x81EA;&#x5B9A;&#x4E49;&#x529F;&#x80FD;&#x7684; middleware &#x6765;&#x6269;&#x5C55; Redux &#x662F;&#x4E00;&#x79CD;&#x63A8;&#x8350;&#x7684;&#x65B9;&#x5F0F;&#x3002;Middleware &#x53EF;&#x4EE5;&#x8BA9;&#x4F60;&#x5305;&#x88C5; store &#x7684; <a href="Store.html#dispatch"><code>dispatch</code></a> &#x65B9;&#x6CD5;&#x6765;&#x8FBE;&#x5230;&#x4F60;&#x60F3;&#x8981;&#x7684;&#x76EE;&#x7684;&#x3002;&#x540C;&#x65F6;&#xFF0C; middleware &#x8FD8;&#x62E5;&#x6709;&#x201C;&#x53EF;&#x7EC4;&#x5408;&#x201D;&#x8FD9;&#x4E00;&#x5173;&#x952E;&#x7279;&#x6027;&#x3002;&#x591A;&#x4E2A; middleware &#x53EF;&#x4EE5;&#x88AB;&#x7EC4;&#x5408;&#x5230;&#x4E00;&#x8D77;&#x4F7F;&#x7528;&#xFF0C;&#x5F62;&#x6210; middleware &#x94FE;&#x3002;&#x5176;&#x4E2D;&#xFF0C;&#x6BCF;&#x4E2A; middleware &#x90FD;&#x4E0D;&#x9700;&#x8981;&#x5173;&#x5FC3;&#x94FE;&#x4E2D;&#x5B83;&#x524D;&#x540E;&#x7684; middleware &#x7684;&#x4EFB;&#x4F55;&#x4FE1;&#x606F;&#x3002;</p>
<p>Middleware &#x6700;&#x5E38;&#x89C1;&#x7684;&#x4F7F;&#x7528;&#x573A;&#x666F;&#x662F;&#x65E0;&#x9700;&#x5F15;&#x7528;&#x5927;&#x91CF;&#x4EE3;&#x7801;&#x6216;&#x4F9D;&#x8D56;&#x7C7B;&#x4F3C; <a href="https://github.com/Reactive-Extensions/RxJS" target="_blank">Rx</a> &#x7684;&#x7B2C;&#x4E09;&#x65B9;&#x5E93;&#x5B9E;&#x73B0;&#x5F02;&#x6B65; actions&#x3002;&#x8FD9;&#x79CD;&#x65B9;&#x5F0F;&#x53EF;&#x4EE5;&#x8BA9;&#x4F60;&#x50CF; dispatch &#x4E00;&#x822C;&#x7684; actions &#x90A3;&#x6837; dispatch <a href="../Glossary.html#async-action">&#x5F02;&#x6B65; actions</a>&#x3002;</p>
<p>&#x4F8B;&#x5982;&#xFF0C;<a href="https://github.com/gaearon/redux-thunk" target="_blank">redux-thunk</a> &#x652F;&#x6301; dispatch function&#xFF0C;&#x4EE5;&#x6B64;&#x8BA9; action creator &#x63A7;&#x5236;&#x53CD;&#x8F6C;&#x3002;&#x88AB; dispatch &#x7684; function &#x4F1A;&#x63A5;&#x6536; <a href="Store.html#dispatch"><code>dispatch</code></a> &#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#xFF0C;&#x5E76;&#x4E14;&#x53EF;&#x4EE5;&#x5F02;&#x6B65;&#x8C03;&#x7528;&#x5B83;&#x3002;&#x8FD9;&#x7C7B;&#x7684; function &#x5C31;&#x79F0;&#x4E3A; <em>thunk</em>&#x3002;&#x53E6;&#x4E00;&#x4E2A; middleware &#x7684;&#x793A;&#x4F8B;&#x662F; <a href="https://github.com/acdlite/redux-promise" target="_blank">redux-promise</a>&#x3002;&#x5B83;&#x652F;&#x6301; dispatch &#x4E00;&#x4E2A;&#x5F02;&#x6B65;&#x7684; <a href="https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Promise" target="_blank">Promise</a> action&#xFF0C;&#x5E76;&#x4E14;&#x5728; Promise resolve &#x540E;&#x53EF;&#x4EE5; dispatch &#x4E00;&#x4E2A;&#x666E;&#x901A;&#x7684; action&#x3002;</p>
<p>Middleware &#x5E76;&#x4E0D;&#x9700;&#x8981;&#x548C; <a href="createStore.html"><code>createStore</code></a> &#x7ED1;&#x5728;&#x4E00;&#x8D77;&#x4F7F;&#x7528;&#xFF0C;&#x4E5F;&#x4E0D;&#x662F; Redux &#x67B6;&#x6784;&#x7684;&#x57FA;&#x7840;&#x7EC4;&#x6210;&#x90E8;&#x5206;&#xFF0C;&#x4F46;&#x5B83;&#x5E26;&#x6765;&#x7684;&#x76CA;&#x5904;&#x8BA9;&#x6211;&#x4EEC;&#x8BA4;&#x4E3A;&#x6709;&#x5FC5;&#x8981;&#x5728; Redux &#x6838;&#x5FC3;&#x4E2D;&#x5305;&#x542B;&#x5BF9;&#x5B83;&#x7684;&#x652F;&#x6301;&#x3002;&#x56E0;&#x6B64;&#xFF0C;&#x867D;&#x7136;&#x4E0D;&#x540C;&#x7684; middleware &#x53EF;&#x80FD;&#x5728;&#x6613;&#x7528;&#x6027;&#x548C;&#x7528;&#x6CD5;&#x4E0A;&#x6709;&#x6240;&#x4E0D;&#x540C;&#xFF0C;&#x5B83;&#x4ECD;&#x88AB;&#x4F5C;&#x4E3A;&#x6269;&#x5C55; <a href="Store.html#dispatch"><code>dispatch</code></a> &#x7684;&#x552F;&#x4E00;&#x6807;&#x51C6;&#x7684;&#x65B9;&#x5F0F;&#x3002;</p>
<h4 id="%E5%8F%82%E6%95%B0">&#x53C2;&#x6570;</h4>
<ul>
<li><code><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>middlewares</code> (<em>arguments</em>): &#x9075;&#x5FAA; Redux <em>middleware API</em> &#x7684;&#x51FD;&#x6570;&#x3002;&#x6BCF;&#x4E2A; middleware &#x63A5;&#x53D7; <a href="Store.html"><code>Store</code></a> &#x7684; <a href="Store.html#dispatch"><code>dispatch</code></a> &#x548C; <a href="Store.html#getState"><code>getState</code></a> &#x51FD;&#x6570;&#x4F5C;&#x4E3A;&#x547D;&#x540D;&#x53C2;&#x6570;&#xFF0C;&#x5E76;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x51FD;&#x6570;&#x3002;&#x8BE5;&#x51FD;&#x6570;&#x4F1A;&#x88AB;&#x4F20;&#x5165;
&#x88AB;&#x79F0;&#x4E3A; <code>next</code> &#x7684;&#x4E0B;&#x4E00;&#x4E2A; middleware &#x7684; dispatch &#x65B9;&#x6CD5;&#xFF0C;&#x5E76;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x63A5;&#x6536; action &#x7684;&#x65B0;&#x51FD;&#x6570;&#xFF0C;&#x8FD9;&#x4E2A;&#x51FD;&#x6570;&#x53EF;&#x4EE5;&#x76F4;&#x63A5;&#x8C03;&#x7528; <code><span class="token function">next</span><span class="token punctuation">(</span>action<span class="token punctuation">)</span></code>&#xFF0C;&#x6216;&#x8005;&#x5728;&#x5176;&#x4ED6;&#x9700;&#x8981;&#x7684;&#x65F6;&#x523B;&#x8C03;&#x7528;&#xFF0C;&#x751A;&#x81F3;&#x6839;&#x672C;&#x4E0D;&#x53BB;&#x8C03;&#x7528;&#x5B83;&#x3002;&#x8C03;&#x7528;&#x94FE;&#x4E2D;&#x6700;&#x540E;&#x4E00;&#x4E2A; middleware &#x4F1A;&#x63A5;&#x53D7;&#x771F;&#x5B9E;&#x7684; store &#x7684; <a href="Store.html#dispatch"><code>dispatch</code></a> &#x65B9;&#x6CD5;&#x4F5C;&#x4E3A; <code>next</code> &#x53C2;&#x6570;&#xFF0C;&#x5E76;&#x501F;&#x6B64;&#x7ED3;&#x675F;&#x8C03;&#x7528;&#x94FE;&#x3002;&#x6240;&#x4EE5;&#xFF0C;middleware &#x7684;&#x51FD;&#x6570;&#x7B7E;&#x540D;&#x662F; <code><span class="token punctuation">(</span><span class="token punctuation">{</span> getState<span class="token punctuation">,</span> dispatch <span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">&gt;</span> next <span class="token operator">=</span><span class="token operator">&gt;</span> action</code>&#x3002;</li>
</ul>
<h4 id="%E8%BF%94%E5%9B%9E%E5%80%BC">&#x8FD4;&#x56DE;&#x503C;</h4>
<p>(<em>Function</em>) &#x4E00;&#x4E2A;&#x5E94;&#x7528;&#x4E86; middleware &#x540E;&#x7684; store enhancer&#x3002;&#x8FD9;&#x4E2A; store enhancer &#x7684;&#x7B7E;&#x540D;&#x662F; <code>createStore <span class="token operator">=</span><span class="token operator">&gt;</span> createStore</code>&#xFF0C;&#x4F46;&#x662F;&#x6700;&#x7B80;&#x5355;&#x7684;&#x4F7F;&#x7528;&#x65B9;&#x6CD5;&#x5C31;&#x662F;&#x76F4;&#x63A5;&#x4F5C;&#x4E3A;&#x6700;&#x540E;&#x4E00;&#x4E2A; <code>enhancer</code> &#x53C2;&#x6570;&#x4F20;&#x9012;&#x7ED9; <a href="createStore.html"><code><span class="token function">createStore</span><span class="token punctuation">(</span><span class="token punctuation">)</span></code></a> &#x51FD;&#x6570;&#x3002;</p>
<h4 id="%E7%A4%BA%E4%BE%8B-%E8%87%AA%E5%AE%9A%E4%B9%89-logger-middleware">&#x793A;&#x4F8B;: &#x81EA;&#x5B9A;&#x4E49; Logger Middleware</h4>
<pre><code class="lang-js"><span class="token keyword">import</span> <span class="token punctuation">{</span> createStore<span class="token punctuation">,</span> applyMiddleware <span class="token punctuation">}</span> from <span class="token string">&apos;redux&apos;</span>
<span class="token keyword">import</span> todos from <span class="token string">&apos;./reducers&apos;</span>

<span class="token keyword">function</span> <span class="token function">logger</span><span class="token punctuation">(</span><span class="token punctuation">{</span> getState <span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token punctuation">(</span>next<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">&gt;</span> <span class="token punctuation">(</span>action<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">&apos;will dispatch&apos;</span><span class="token punctuation">,</span> action<span class="token punctuation">)</span>

    <span class="token comment" spellcheck="true">// &#x8C03;&#x7528; middleware &#x94FE;&#x4E2D;&#x4E0B;&#x4E00;&#x4E2A; middleware &#x7684; dispatch&#x3002;</span>
    <span class="token keyword">let</span> returnValue <span class="token operator">=</span> <span class="token function">next</span><span class="token punctuation">(</span>action<span class="token punctuation">)</span>

    console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">&apos;state after dispatch&apos;</span><span class="token punctuation">,</span> <span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span>

    <span class="token comment" spellcheck="true">// &#x4E00;&#x822C;&#x4F1A;&#x662F; action &#x672C;&#x8EAB;&#xFF0C;&#x9664;&#x975E;</span>
    <span class="token comment" spellcheck="true">// &#x540E;&#x9762;&#x7684; middleware &#x4FEE;&#x6539;&#x4E86;&#x5B83;&#x3002;</span>
    <span class="token keyword">return</span> returnValue
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">let</span> store <span class="token operator">=</span> <span class="token function">createStore</span><span class="token punctuation">(</span>
  todos<span class="token punctuation">,</span>
  <span class="token punctuation">[</span> <span class="token string">&apos;Use Redux&apos;</span> <span class="token punctuation">]</span><span class="token punctuation">,</span>
  <span class="token function">applyMiddleware</span><span class="token punctuation">(</span>logger<span class="token punctuation">)</span>
<span class="token punctuation">)</span>

store<span class="token punctuation">.</span><span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  type<span class="token punctuation">:</span> <span class="token string">&apos;ADD_TODO&apos;</span><span class="token punctuation">,</span>
  text<span class="token punctuation">:</span> <span class="token string">&apos;Understand the middleware&apos;</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token comment" spellcheck="true">// (&#x5C06;&#x6253;&#x5370;&#x5982;&#x4E0B;&#x4FE1;&#x606F;:)</span>
<span class="token comment" spellcheck="true">// will dispatch: { type: &apos;ADD_TODO&apos;, text: &apos;Understand the middleware&apos; }</span>
<span class="token comment" spellcheck="true">// state after dispatch: [ &apos;Use Redux&apos;, &apos;Understand the middleware&apos; ]</span>
</code></pre>
<h4 id="%E7%A4%BA%E4%BE%8B-%E4%BD%BF%E7%94%A8-thunk-middleware-%E6%9D%A5%E5%81%9A%E5%BC%82%E6%AD%A5-action">&#x793A;&#x4F8B;: &#x4F7F;&#x7528; Thunk Middleware &#x6765;&#x505A;&#x5F02;&#x6B65; Action</h4>
<pre><code class="lang-js"><span class="token keyword">import</span> <span class="token punctuation">{</span> createStore<span class="token punctuation">,</span> combineReducers<span class="token punctuation">,</span> applyMiddleware <span class="token punctuation">}</span> from <span class="token string">&apos;redux&apos;</span>
<span class="token keyword">import</span> thunk from <span class="token string">&apos;redux-thunk&apos;</span>
<span class="token keyword">import</span> <span class="token operator">*</span> as reducers from <span class="token string">&apos;./reducers&apos;</span>

<span class="token keyword">let</span> reducer <span class="token operator">=</span> <span class="token function">combineReducers</span><span class="token punctuation">(</span>reducers<span class="token punctuation">)</span>
<span class="token comment" spellcheck="true">// applyMiddleware &#x4E3A; createStore &#x6CE8;&#x5165;&#x4E86; middleware:</span>
<span class="token keyword">let</span> store <span class="token operator">=</span> <span class="token function">createStore</span><span class="token punctuation">(</span>reducer<span class="token punctuation">,</span> <span class="token function">applyMiddleware</span><span class="token punctuation">(</span>thunk<span class="token punctuation">)</span><span class="token punctuation">)</span>

<span class="token keyword">function</span> <span class="token function">fetchSecretSauce</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token function">fetch</span><span class="token punctuation">(</span><span class="token string">&apos;https://www.google.com/search?q=secret+sauce&apos;</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span>

<span class="token comment" spellcheck="true">// &#x8FD9;&#x4E9B;&#x662F;&#x4F60;&#x5DF2;&#x719F;&#x6089;&#x7684;&#x666E;&#x901A; action creator&#x3002;</span>
<span class="token comment" spellcheck="true">// &#x5B83;&#x4EEC;&#x8FD4;&#x56DE;&#x7684; action &#x4E0D;&#x9700;&#x8981;&#x4EFB;&#x4F55; middleware &#x5C31;&#x80FD;&#x88AB; dispatch&#x3002;</span>
<span class="token comment" spellcheck="true">// &#x4F46;&#x662F;&#xFF0C;&#x4ED6;&#x4EEC;&#x53EA;&#x8868;&#x8FBE;&#x300C;&#x4E8B;&#x5B9E;&#x300D;&#xFF0C;&#x5E76;&#x4E0D;&#x8868;&#x8FBE;&#x300C;&#x5F02;&#x6B65;&#x6570;&#x636E;&#x6D41;&#x300D;</span>

<span class="token keyword">function</span> <span class="token function">makeASandwich</span><span class="token punctuation">(</span>forPerson<span class="token punctuation">,</span> secretSauce<span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token punctuation">{</span>
    type<span class="token punctuation">:</span> <span class="token string">&apos;MAKE_SANDWICH&apos;</span><span class="token punctuation">,</span>
    forPerson<span class="token punctuation">,</span>
    secretSauce
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">function</span> <span class="token function">apologize</span><span class="token punctuation">(</span>fromPerson<span class="token punctuation">,</span> toPerson<span class="token punctuation">,</span> error<span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token punctuation">{</span>
    type<span class="token punctuation">:</span> <span class="token string">&apos;APOLOGIZE&apos;</span><span class="token punctuation">,</span>
    fromPerson<span class="token punctuation">,</span>
    toPerson<span class="token punctuation">,</span>
    error
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">function</span> <span class="token function">withdrawMoney</span><span class="token punctuation">(</span>amount<span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token punctuation">{</span>
    type<span class="token punctuation">:</span> <span class="token string">&apos;WITHDRAW&apos;</span><span class="token punctuation">,</span>
    amount
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token comment" spellcheck="true">// &#x5373;&#x4F7F;&#x4E0D;&#x4F7F;&#x7528; middleware&#xFF0C;&#x4F60;&#x4E5F;&#x53EF;&#x4EE5; dispatch action&#xFF1A;</span>
store<span class="token punctuation">.</span><span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token function">withdrawMoney</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">)</span><span class="token punctuation">)</span>

<span class="token comment" spellcheck="true">// &#x4F46;&#x662F;&#x600E;&#x6837;&#x5904;&#x7406;&#x5F02;&#x6B65; action &#x5462;&#xFF0C;</span>
<span class="token comment" spellcheck="true">// &#x6BD4;&#x5982; API &#x8C03;&#x7528;&#xFF0C;&#x6216;&#x8005;&#x662F;&#x8DEF;&#x7531;&#x8DF3;&#x8F6C;&#xFF1F;</span>

<span class="token comment" spellcheck="true">// &#x6765;&#x770B;&#x4E00;&#x4E0B; thunk&#x3002;</span>
<span class="token comment" spellcheck="true">// Thunk &#x5C31;&#x662F;&#x4E00;&#x4E2A;&#x8FD4;&#x56DE;&#x51FD;&#x6570;&#x7684;&#x51FD;&#x6570;&#x3002;</span>
<span class="token comment" spellcheck="true">// &#x4E0B;&#x9762;&#x5C31;&#x662F;&#x4E00;&#x4E2A; thunk&#x3002;</span>

<span class="token keyword">function</span> <span class="token function">makeASandwichWithSecretSauce</span><span class="token punctuation">(</span>forPerson<span class="token punctuation">)</span> <span class="token punctuation">{</span>

  <span class="token comment" spellcheck="true">// &#x63A7;&#x5236;&#x53CD;&#x8F6C;&#xFF01;</span>
  <span class="token comment" spellcheck="true">// &#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x63A5;&#x6536; `dispatch` &#x7684;&#x51FD;&#x6570;&#x3002;</span>
  <span class="token comment" spellcheck="true">// Thunk middleware &#x77E5;&#x9053;&#x5982;&#x4F55;&#x628A;&#x5F02;&#x6B65;&#x7684; thunk action &#x8F6C;&#x4E3A;&#x666E;&#x901A; action&#x3002;</span>

  <span class="token keyword">return</span> <span class="token keyword">function</span> <span class="token punctuation">(</span>dispatch<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token function">fetchSecretSauce</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span>
      sauce <span class="token operator">=</span><span class="token operator">&gt;</span> <span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token function">makeASandwich</span><span class="token punctuation">(</span>forPerson<span class="token punctuation">,</span> sauce<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
      error <span class="token operator">=</span><span class="token operator">&gt;</span> <span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token function">apologize</span><span class="token punctuation">(</span><span class="token string">&apos;The Sandwich Shop&apos;</span><span class="token punctuation">,</span> forPerson<span class="token punctuation">,</span> error<span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token comment" spellcheck="true">// Thunk middleware &#x53EF;&#x4EE5;&#x8BA9;&#x6211;&#x4EEC;&#x50CF; dispatch &#x666E;&#x901A; action</span>
<span class="token comment" spellcheck="true">// &#x4E00;&#x6837; dispatch &#x5F02;&#x6B65;&#x7684; thunk action&#x3002;</span>

store<span class="token punctuation">.</span><span class="token function">dispatch</span><span class="token punctuation">(</span>
  <span class="token function">makeASandwichWithSecretSauce</span><span class="token punctuation">(</span><span class="token string">&apos;Me&apos;</span><span class="token punctuation">)</span>
<span class="token punctuation">)</span>

<span class="token comment" spellcheck="true">// &#x5B83;&#x751A;&#x81F3;&#x8D1F;&#x8D23;&#x56DE;&#x4F20; thunk &#x88AB; dispatch &#x540E;&#x8FD4;&#x56DE;&#x7684;&#x503C;&#xFF0C;</span>
<span class="token comment" spellcheck="true">// &#x6240;&#x4EE5;&#x53EF;&#x4EE5;&#x7EE7;&#x7EED;&#x4E32;&#x8FDE; Promise&#xFF0C;&#x8C03;&#x7528;&#x5B83;&#x7684; .then() &#x65B9;&#x6CD5;&#x3002;</span>

store<span class="token punctuation">.</span><span class="token function">dispatch</span><span class="token punctuation">(</span>
  <span class="token function">makeASandwichWithSecretSauce</span><span class="token punctuation">(</span><span class="token string">&apos;My wife&apos;</span><span class="token punctuation">)</span>
<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">&gt;</span> <span class="token punctuation">{</span>
  console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">&apos;Done!&apos;</span><span class="token punctuation">)</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>

<span class="token comment" spellcheck="true">// &#x5B9E;&#x9645;&#x4E0A;&#xFF0C;&#x53EF;&#x4EE5;&#x5199;&#x4E00;&#x4E2A; dispatch &#x5176;&#x5B83; action creator &#x91CC;</span>
<span class="token comment" spellcheck="true">// &#x666E;&#x901A; action &#x548C;&#x5F02;&#x6B65; action &#x7684; action creator&#xFF0C;</span>
<span class="token comment" spellcheck="true">// &#x800C;&#x4E14;&#x53EF;&#x4EE5;&#x4F7F;&#x7528; Promise &#x6765;&#x63A7;&#x5236;&#x6570;&#x636E;&#x6D41;&#x3002;</span>

<span class="token keyword">function</span> <span class="token function">makeSandwichesForEverybody</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token keyword">function</span> <span class="token punctuation">(</span>dispatch<span class="token punctuation">,</span> getState<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span><span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span>sandwiches<span class="token punctuation">.</span>isShopOpen<span class="token punctuation">)</span> <span class="token punctuation">{</span>

      <span class="token comment" spellcheck="true">// &#x8FD4;&#x56DE; Promise &#x5E76;&#x4E0D;&#x662F;&#x5FC5;&#x987B;&#x7684;&#xFF0C;&#x4F46;&#x8FD9;&#x662F;&#x4E00;&#x4E2A;&#x5F88;&#x597D;&#x7684;&#x7EA6;&#x5B9A;&#xFF0C;</span>
      <span class="token comment" spellcheck="true">// &#x4E3A;&#x4E86;&#x8BA9;&#x8C03;&#x7528;&#x8005;&#x80FD;&#x591F;&#x5728;&#x5F02;&#x6B65;&#x7684; dispatch &#x7ED3;&#x679C;&#x4E0A;&#x76F4;&#x63A5;&#x8C03;&#x7528; .then() &#x65B9;&#x6CD5;&#x3002;</span>

      <span class="token keyword">return</span> Promise<span class="token punctuation">.</span><span class="token function">resolve</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
    <span class="token punctuation">}</span>

    <span class="token comment" spellcheck="true">// &#x53EF;&#x4EE5; dispatch &#x666E;&#x901A; action &#x5BF9;&#x8C61;&#x548C;&#x5176;&#x5B83; thunk&#xFF0C;</span>
    <span class="token comment" spellcheck="true">// &#x8FD9;&#x6837;&#x6211;&#x4EEC;&#x5C31;&#x53EF;&#x4EE5;&#x5728;&#x4E00;&#x4E2A;&#x6570;&#x636E;&#x6D41;&#x4E2D;&#x7EC4;&#x5408;&#x591A;&#x4E2A;&#x5F02;&#x6B65; action&#x3002;</span>

    <span class="token keyword">return</span> <span class="token function">dispatch</span><span class="token punctuation">(</span>
      <span class="token function">makeASandwichWithSecretSauce</span><span class="token punctuation">(</span><span class="token string">&apos;My Grandma&apos;</span><span class="token punctuation">)</span>
    <span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">&gt;</span>
      Promise<span class="token punctuation">.</span><span class="token function">all</span><span class="token punctuation">(</span><span class="token punctuation">[</span>
        <span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token function">makeASandwichWithSecretSauce</span><span class="token punctuation">(</span><span class="token string">&apos;Me&apos;</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
        <span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token function">makeASandwichWithSecretSauce</span><span class="token punctuation">(</span><span class="token string">&apos;My wife&apos;</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
      <span class="token punctuation">]</span><span class="token punctuation">)</span>
    <span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">&gt;</span>
      <span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token function">makeASandwichWithSecretSauce</span><span class="token punctuation">(</span><span class="token string">&apos;Our kids&apos;</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
    <span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">&gt;</span>
      <span class="token function">dispatch</span><span class="token punctuation">(</span><span class="token function">getState</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span>myMoney <span class="token operator">&gt;</span> <span class="token number">42</span> <span class="token operator">?</span>
        <span class="token function">withdrawMoney</span><span class="token punctuation">(</span><span class="token number">42</span><span class="token punctuation">)</span> <span class="token punctuation">:</span>
        <span class="token function">apologize</span><span class="token punctuation">(</span><span class="token string">&apos;Me&apos;</span><span class="token punctuation">,</span> <span class="token string">&apos;The Sandwich Shop&apos;</span><span class="token punctuation">)</span>
      <span class="token punctuation">)</span>
    <span class="token punctuation">)</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token comment" spellcheck="true">// &#x8FD9;&#x5728;&#x670D;&#x52A1;&#x7AEF;&#x6E32;&#x67D3;&#x65F6;&#x5F88;&#x6709;&#x7528;&#xFF0C;&#x56E0;&#x4E3A;&#x6211;&#x53EF;&#x4EE5;&#x7B49;&#x5230;&#x6570;&#x636E;</span>
<span class="token comment" spellcheck="true">// &#x51C6;&#x5907;&#x597D;&#x540E;&#xFF0C;&#x540C;&#x6B65;&#x7684;&#x6E32;&#x67D3;&#x5E94;&#x7528;&#x3002;</span>

<span class="token keyword">import</span> <span class="token punctuation">{</span> renderToString <span class="token punctuation">}</span> from <span class="token string">&apos;react-dom/server&apos;</span>

store<span class="token punctuation">.</span><span class="token function">dispatch</span><span class="token punctuation">(</span>
  <span class="token function">makeSandwichesForEverybody</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">then</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">&gt;</span>
  response<span class="token punctuation">.</span><span class="token function">send</span><span class="token punctuation">(</span><span class="token function">renderToString</span><span class="token punctuation">(</span><span class="token operator">&lt;</span>MyApp store<span class="token operator">=</span><span class="token punctuation">{</span>store<span class="token punctuation">}</span> <span class="token operator">/</span><span class="token operator">&gt;</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
<span class="token punctuation">)</span>

<span class="token comment" spellcheck="true">// &#x4E5F;&#x53EF;&#x4EE5;&#x5728;&#x4EFB;&#x4F55;&#x5BFC;&#x81F4;&#x7EC4;&#x4EF6;&#x7684; props &#x53D8;&#x5316;&#x7684;&#x65F6;&#x523B;</span>
<span class="token comment" spellcheck="true">// dispatch &#x4E00;&#x4E2A;&#x5F02;&#x6B65; thunk action&#x3002;</span>

<span class="token keyword">import</span> <span class="token punctuation">{</span> connect <span class="token punctuation">}</span> from <span class="token string">&apos;react-redux&apos;</span>
<span class="token keyword">import</span> <span class="token punctuation">{</span> Component <span class="token punctuation">}</span> from <span class="token string">&apos;react&apos;</span>

<span class="token keyword">class</span> <span class="token class-name">SandwichShop</span> <span class="token keyword">extends</span> <span class="token class-name">Component</span> <span class="token punctuation">{</span>
  <span class="token function">componentDidMount</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>props<span class="token punctuation">.</span><span class="token function">dispatch</span><span class="token punctuation">(</span>
      <span class="token function">makeASandwichWithSecretSauce</span><span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>props<span class="token punctuation">.</span>forPerson<span class="token punctuation">)</span>
    <span class="token punctuation">)</span>
  <span class="token punctuation">}</span>

  <span class="token function">componentWillReceiveProps</span><span class="token punctuation">(</span>nextProps<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">if</span> <span class="token punctuation">(</span>nextProps<span class="token punctuation">.</span>forPerson <span class="token operator">!</span><span class="token operator">==</span> <span class="token keyword">this</span><span class="token punctuation">.</span>props<span class="token punctuation">.</span>forPerson<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">this</span><span class="token punctuation">.</span>props<span class="token punctuation">.</span><span class="token function">dispatch</span><span class="token punctuation">(</span>
        <span class="token function">makeASandwichWithSecretSauce</span><span class="token punctuation">(</span>nextProps<span class="token punctuation">.</span>forPerson<span class="token punctuation">)</span>
      <span class="token punctuation">)</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>

  <span class="token function">render</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">return</span> <span class="token operator">&lt;</span>p<span class="token operator">&gt;</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>props<span class="token punctuation">.</span>sandwiches<span class="token punctuation">.</span><span class="token function">join</span><span class="token punctuation">(</span><span class="token string">&apos;mustard&apos;</span><span class="token punctuation">)</span><span class="token punctuation">}</span><span class="token operator">&lt;</span><span class="token operator">/</span>p<span class="token operator">&gt;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token keyword">export</span> <span class="token keyword">default</span> <span class="token function">connect</span><span class="token punctuation">(</span>
  state <span class="token operator">=</span><span class="token operator">&gt;</span> <span class="token punctuation">(</span><span class="token punctuation">{</span>
    sandwiches<span class="token punctuation">:</span> state<span class="token punctuation">.</span>sandwiches
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
<span class="token punctuation">)</span><span class="token punctuation">(</span>SandwichShop<span class="token punctuation">)</span>
</code></pre>
<h4 id="%E5%B0%8F%E8%B4%B4%E5%A3%AB">&#x5C0F;&#x8D34;&#x58EB;</h4>
<ul>
<li><p>Middleware &#x53EA;&#x662F;&#x5305;&#x88C5;&#x4E86; store &#x7684; <a href="Store.html#dispatch"><code>dispatch</code></a> &#x65B9;&#x6CD5;&#x3002;&#x6280;&#x672F;&#x4E0A;&#x8BB2;&#xFF0C;&#x4EFB;&#x4F55; middleware &#x80FD;&#x505A;&#x7684;&#x4E8B;&#x60C5;&#xFF0C;&#x90FD;&#x53EF;&#x80FD;&#x901A;&#x8FC7;&#x624B;&#x52A8;&#x5305;&#x88C5; <code>dispatch</code> &#x8C03;&#x7528;&#x6765;&#x5B9E;&#x73B0;&#xFF0C;&#x4F46;&#x662F;&#x653E;&#x5728;&#x540C;&#x4E00;&#x4E2A;&#x5730;&#x65B9;&#x7EDF;&#x4E00;&#x7BA1;&#x7406;&#x4F1A;&#x4F7F;&#x6574;&#x4E2A;&#x9879;&#x76EE;&#x7684;&#x6269;&#x5C55;&#x53D8;&#x7684;&#x5BB9;&#x6613;&#x5F97;&#x591A;&#x3002;</p>
</li>
<li><p>&#x5982;&#x679C;&#x9664;&#x4E86; <code>applyMiddleware</code>&#xFF0C;&#x4F60;&#x8FD8;&#x7528;&#x4E86;&#x5176;&#x5B83; store enhancer&#xFF0C;&#x4E00;&#x5B9A;&#x8981;&#x628A; <code>applyMiddleware</code> &#x653E;&#x5230;&#x7EC4;&#x5408;&#x94FE;&#x7684;&#x524D;&#x9762;&#xFF0C;&#x56E0;&#x4E3A; middleware &#x53EF;&#x80FD;&#x4F1A;&#x5305;&#x542B;&#x5F02;&#x6B65;&#x64CD;&#x4F5C;&#x3002;&#x6BD4;&#x5982;&#xFF0C;&#x5B83;&#x5E94;&#x8BE5;&#x5728; <a href="https://github.com/gaearon/redux-devtools" target="_blank">redux-devtools</a> &#x524D;&#x9762;&#xFF0C;&#x5426;&#x5219; DevTools &#x5C31;&#x770B;&#x4E0D;&#x5230; Promise middleware &#x91CC; dispatch &#x7684; action &#x4E86;&#x3002;</p>
</li>
<li><p>&#x5982;&#x679C;&#x4F60;&#x60F3;&#x6709;&#x6761;&#x4EF6;&#x5730;&#x4F7F;&#x7528; middleware&#xFF0C;&#x8BB0;&#x4F4F;&#x53EA; import &#x9700;&#x8981;&#x7684;&#x90E8;&#x5206;&#xFF1A;</p>
<pre><code class="lang-js"><span class="token keyword">let</span> middleware <span class="token operator">=</span> <span class="token punctuation">[</span> a<span class="token punctuation">,</span> b <span class="token punctuation">]</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>process<span class="token punctuation">.</span>env<span class="token punctuation">.</span>NODE_ENV <span class="token operator">!</span><span class="token operator">==</span> <span class="token string">&apos;production&apos;</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">let</span> c <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">&apos;some-debug-middleware&apos;</span><span class="token punctuation">)</span>
  <span class="token keyword">let</span> d <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">&apos;another-debug-middleware&apos;</span><span class="token punctuation">)</span>
  middleware <span class="token operator">=</span> <span class="token punctuation">[</span> <span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>middleware<span class="token punctuation">,</span> c<span class="token punctuation">,</span> d <span class="token punctuation">]</span>
<span class="token punctuation">}</span>

<span class="token keyword">const</span> store <span class="token operator">=</span> <span class="token function">createStore</span><span class="token punctuation">(</span>
  reducer<span class="token punctuation">,</span>
  preloadedState<span class="token punctuation">,</span>
  <span class="token function">applyMiddleware</span><span class="token punctuation">(</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>middleware<span class="token punctuation">)</span>
<span class="token punctuation">)</span>
</code></pre>
<p>&#x8FD9;&#x6837;&#x505A;&#x6709;&#x5229;&#x4E8E;&#x6253;&#x5305;&#x65F6;&#x53BB;&#x6389;&#x4E0D;&#x9700;&#x8981;&#x7684;&#x6A21;&#x5757;&#xFF0C;&#x51CF;&#x5C0F;&#x6253;&#x5305;&#x6587;&#x4EF6;&#x5927;&#x5C0F;&#x3002;</p>
</li>
<li><p>&#x6709;&#x60F3;&#x8FC7; <code>applyMiddleware</code> &#x672C;&#x8D28;&#x662F;&#x4EC0;&#x4E48;&#x5417;&#xFF1F;&#x5B83;&#x80AF;&#x5B9A;&#x662F;&#x6BD4; middleware &#x8FD8;&#x5F3A;&#x5927;&#x7684;&#x6269;&#x5C55;&#x673A;&#x5236;&#x3002;&#x5B9E;&#x9645;&#x4E0A;&#xFF0C;<code>applyMiddleware</code> &#x53EA;&#x662F;&#x88AB;&#x79F0;&#x4E3A; Redux &#x6700;&#x5F3A;&#x5927;&#x7684;&#x6269;&#x5C55;&#x673A;&#x5236;&#x7684; <a href="../Glossary.html#store-enhancer">store enhancer</a> &#x4E2D;&#x7684;&#x4E00;&#x4E2A;&#x8303;&#x4F8B;&#x800C;&#x5DF2;&#x3002;&#x4F60;&#x4E0D;&#x592A;&#x53EF;&#x80FD;&#x9700;&#x8981;&#x5B9E;&#x73B0;&#x81EA;&#x5DF1;&#x7684; store enhancer&#x3002;&#x53E6;&#x4E00;&#x4E2A; store enhancer &#x793A;&#x4F8B;&#x662F; <a href="https://github.com/gaearon/redux-devtools" target="_blank">redux-devtools</a>&#x3002;Middleware &#x5E76;&#x6CA1;&#x6709; store enhancer &#x5F3A;&#x5927;&#xFF0C;&#x4F46;&#x5F00;&#x53D1;&#x8D77;&#x6765;&#x5374;&#x662F;&#x66F4;&#x5BB9;&#x6613;&#x7684;&#x3002;</p>
</li>
<li><p>Middleware &#x542C;&#x8D77;&#x6765;&#x6BD4;&#x5B9E;&#x9645;&#x96BE;&#x4E00;&#x4E9B;&#x3002;&#x771F;&#x6B63;&#x7406;&#x89E3; middleware &#x7684;&#x552F;&#x4E00;&#x529E;&#x6CD5;&#x662F;&#x4E86;&#x89E3;&#x73B0;&#x6709;&#x7684; middleware &#x662F;&#x5982;&#x4F55;&#x5DE5;&#x4F5C;&#x7684;&#xFF0C;&#x5E76;&#x5C1D;&#x8BD5;&#x81EA;&#x5DF1;&#x5B9E;&#x73B0;&#x3002;&#x9700;&#x8981;&#x7684;&#x529F;&#x80FD;&#x53EF;&#x80FD;&#x9519;&#x7EFC;&#x590D;&#x6742;&#xFF0C;&#x4F46;&#x662F;&#x4F60;&#x4F1A;&#x53D1;&#x73B0;&#x5927;&#x90E8;&#x5206; middleware &#x5B9E;&#x9645;&#x4E0A;&#x5F88;&#x5C0F;&#xFF0C;&#x53EA;&#x6709; 10 &#x884C;&#x5DE6;&#x53F3;&#xFF0C;&#x662F;&#x901A;&#x8FC7;&#x5BF9;&#x5B83;&#x4EEC;&#x7684;&#x7EC4;&#x5408;&#x4F7F;&#x7528;&#x6765;&#x8FBE;&#x5230;&#x6700;&#x7EC8;&#x7684;&#x76EE;&#x7684;&#x3002;</p>
</li>
<li><p>&#x60F3;&#x8981;&#x4F7F;&#x7528;&#x591A;&#x4E2A; store enhancer&#xFF0C;&#x53EF;&#x4EE5;&#x4F7F;&#x7528; <a href="compose.html"><code><span class="token function">compose</span><span class="token punctuation">(</span><span class="token punctuation">)</span></code></a> &#x65B9;&#x6CD5;&#x3002;</p>
</li>
</ul>

                    
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